CN219914742U - Pressure sensor for outputting high-precision signals - Google Patents
Pressure sensor for outputting high-precision signals Download PDFInfo
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- CN219914742U CN219914742U CN202321625519.XU CN202321625519U CN219914742U CN 219914742 U CN219914742 U CN 219914742U CN 202321625519 U CN202321625519 U CN 202321625519U CN 219914742 U CN219914742 U CN 219914742U
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- rubber sealing
- sealing body
- magnetizer
- supporting plate
- spool
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- 229920001971 elastomer Polymers 0.000 claims abstract description 92
- 238000007789 sealing Methods 0.000 claims abstract description 70
- 238000004804 winding Methods 0.000 claims description 2
- 230000003139 buffering effect Effects 0.000 claims 4
- 239000000806 elastomer Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The technical scheme of the utility model discloses a pressure sensor for outputting high-precision signals, which comprises an outer cover, a bottom cover, an upper spring, a magnetizer, a rubber sealing body supporting plate, a vortex-shaped buffer support, a bottom adjusting rod and air holes; the outer cover is buckled above the bottom cover to form an inner cavity, and the rubber sealing body divides the inner cavity into an upper part and a lower part; the upper spring is arranged on the upper side of the magnetizer, and coils are arranged on the outer sides of the magnetizer and the upper spring; the rubber sealing body supporting plate and the vortex-shaped buffer support are arranged between the rubber sealing body and the bottom cover, the vortex-shaped buffer support is arranged on the outer side of the rubber sealing body supporting plate, the air holes are formed in the lower portion of the bottom cover, the bottom adjusting rod is arranged in the air holes, and the initial position of the magnetizer is accurately adjusted through the mutual matching of the bottom adjusting rod, the rubber sealing body supporting plate, the upper spring and the like, so that the accuracy of an initial signal output by the sensor is improved.
Description
Technical Field
The utility model belongs to the technical field of pressure sensors, and particularly relates to a pressure sensor for outputting high-precision signals.
Background
At present, a pressure sensor used on small household appliances such as washing machines is usually used for converting pressure change into an electric signal through the principle of magnetic field coil inductance, and a magnetic core is usually moved in a coil by using only one elastomer in the pressure sensor, but one elastomer is unstable in the radial direction of the elastomer, particularly in washing machine equipment, when the washing machine dehydrates at a high speed, high-frequency vibration can be generated, and a diaphragm can vibrate in the radial direction of the spring to influence the accuracy of a sensing signal, so that part of the pressure sensor uses two elastomers to reduce disturbance in the radial direction of the elastomer in order to improve the accuracy.
Patent CN 208432358U discloses a pressure sensor, which comprises a sensor body, wherein the sensor body comprises a shell, an elastic piece, a supporting seat for supporting the elastic piece, a circuit board assembly, a magnetic core bracket for supporting the magnetic core, a coil assembly in the magnetic core, an air cover and a diaphragm arranged in the air cover, and a fixing piece fixedly connected with an electric appliance is arranged on the shell; the disturbance in the radial direction of the elastic piece is reduced through the upper elastic piece and the lower elastic piece, but a certain error exists in the initial position of the magnetic core during installation, and the accuracy of an output signal is affected. It is therefore desirable to develop a pressure sensor that improves the accuracy of the output signal.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides the pressure sensor for outputting the high-precision signal, and the initial position of the magnetizer is precisely adjusted by mutually matching the bottom adjusting rod, the rubber sealing body supporting plate, the upper spring and the like, so that the precision of the initial signal output by the sensor is improved.
The technical scheme of the utility model is as follows: a pressure sensor for outputting high-precision signals comprises an outer cover, a bottom cover, an upper spring, a magnetizer, a rubber sealing body supporting plate, a vortex-shaped buffer support, a bottom adjusting rod and air holes; the outer cover is buckled above the bottom cover to form an inner cavity, and the rubber sealing body divides the inner cavity into an upper part and a lower part; the upper spring is arranged on the upper side of the magnetizer, and coils are arranged on the outer sides of the magnetizer and the upper spring; the rubber sealing body supporting plate and the vortex buffer support are arranged between the rubber sealing body and the bottom cover, the vortex buffer support is arranged on the outer side of the rubber sealing body supporting plate, the outer end of the vortex buffer support is arranged on the upper portion of the bottom cover, the center of the vortex buffer support is arranged on the lower portion of the rubber sealing body supporting plate, air holes are formed in the lower portion of the bottom cover, and the bottom adjusting rod is arranged in the air holes.
Further, the air holes are rectangular holes, and an arc structure which is outwards recessed is arranged in the middle of each rectangular hole.
Further, the lower end of the air hole is communicated with the outer side of the bottom cover, and the upper end of the air hole is communicated with the inner cavity between the bottom cover and the rubber sealing body.
Further, the upper end of the bottom adjusting rod is propped against the lower end of the rubber sealing body supporting plate, and the rubber sealing body supporting plate is propped against the lower end of the rubber sealing body.
Further, the bottom adjusting rod, the rubber sealing body supporting plate, the magnetizer and the upper spring are coaxially arranged. Further, set up the spool between enclosing cover and the rubber seal body, magnetizer and last spring set up in the spool, enameled wire winding forms the coil in the outside of spool, the circuit board is installed on the spool, the upper end of going up the spring sets up the screw, screw installation is fixed in the spool, the both ends top of going up the spring is tightly between magnetizer and screw, the lower extreme joint of bottom and spool compresses tightly the rubber seal body between bottom and spool, the lower extreme of magnetizer sets up the diaphragm board, the diaphragm board has been born to rubber seal body upside, the magnetizer has been born to the upside of diaphragm board, the diaphragm board sets up hollow inner chamber, the inner chamber corresponds with magnetizer inside, the rubber seal body is sunken to diaphragm board inner chamber.
When the pressure sensor outputting the high-precision signal works, the lower end of the air hole is communicated with a device needing to detect pressure, the air hole is prevented from being blocked by the bottom adjusting rod through the shape of the air hole, so that the pressure on the lower side of the rubber sealing body is the same as the pressure needing to be detected, the bottom adjusting rod is adjusted, the initial positions of the rubber sealing body supporting plate and the rubber sealing body are changed, and the rubber sealing body supporting plate and the upper spring are matched to position the initial position of the magnetizer. When pressure changes to be detected, the rubber sealing body supporting plate and the rubber sealing body move up and down under the action of pressure, so that the diaphragm plate drives the magnetizer to move up and down in the coil, inductance is changed, frequency output of the oscillating circuit is utilized, signal changes caused by air pressure changes are fed back, and sensor output signal changes are realized. The vortex-shaped buffer support provides acting force in the axial direction and is matched with the upper spring, so that the magnetizer is suspended in the coil, meanwhile, the radial offset force of the upper spring is eliminated in the radial direction, the movement of the magnetizer is in a free state in the radial direction, if only the upper spring is used, the upper spring is only fixed at the upper end, and when the upper spring is loosened or pre-compressed, the initial pressure is nonlinear, so that the output frequency cannot be in linear relation with the pressure value. The initial position of the magnetizer in the free state is freely adjusted by arranging the bottom adjusting rod, so that an accurate initial signal value is output.
By adopting the technical scheme, the beneficial effects of the utility model are as follows:
(1) According to the utility model, the initial position of the magnetizer is accurately adjusted through the bottom adjusting rod, the rubber sealing body supporting plate and the upper spring, so that the accuracy of an initial signal output by the sensor is improved, and the magnetizer is suspended in the middle of the coil through the upper spring and the rubber sealing body, so that the initial variable of the pressure sensor has no hysteresis or advance, the linearity of a force value and an inductance is maintained, and the requirement of the detection accuracy of pressure from zero is met.
(2) Through the shape of limiting the bleeder vent, ensure that bottom adjusting rod can support rubber seal body backup pad and carry out the location of magnetizer initial position, can guarantee that the bleeder vent smoothly ventilates again for the atmospheric pressure of rubber seal body downside is the same with the atmospheric pressure that waits to detect of bleeder vent intercommunication, thereby realizes the detection of pressure.
(3) Simple structure, convenient adjustment and operation.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic structural view of the bottom cover of the present utility model.
In the figure, an outer cover 1, a bottom cover 2, an upper spring 3, a magnetizer 4, a rubber seal 5, a rubber seal support plate 6, a vortex-shaped buffer support 7, a bottom adjusting rod 8, an air vent 9, a spool 10, a screw 11 and a diaphragm plate 12.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
Example 1
Referring to fig. 1 to 2, a pressure sensor for outputting a high-precision signal includes an outer cover 1, a bottom cover 2, an upper spring 3, a magnetizer 4, a rubber sealing body 5, a rubber sealing body supporting plate 6, a vortex-shaped buffer support 7, a bottom adjusting rod 8 and an air vent 9; the outer cover 1 is buckled above the bottom cover 2 to form an inner cavity, and the rubber sealing body 5 divides the inner cavity into an upper part and a lower part; the magnetizer 4 and the upper spring 3 are arranged between the rubber sealing body 5 and the outer cover 1, the upper spring 3 is arranged on the upper side of the magnetizer 4, and coils are arranged on the outer sides of the magnetizer 4 and the upper spring 3; the rubber sealing body supporting plate 6 and the vortex buffer supporting plate 7 are arranged between the rubber sealing body 5 and the bottom cover 2, the vortex buffer supporting plate 7 is arranged on the outer side of the rubber sealing body supporting plate 6, the outer end of the vortex buffer supporting plate 7 is arranged on the upper portion of the bottom cover 2, the center of the vortex buffer supporting plate 7 is arranged on the lower portion of the rubber sealing body supporting plate 6, the air holes 9 are formed in the lower portion of the bottom cover 2, and the bottom adjusting rod 8 is arranged in the air holes (9).
The magnetizer 4 is positioned in the middle of the coil through the upper spring 3, the vortex buffer support 7, the rubber seal body support plate 6 and the rubber seal body 5, the magnetizer 4 quantitatively moves in the coil under the interaction of the upper spring 3, the vortex buffer support 7 and the air pressure, the movement of the magnetizer 4 changes a magnetic field, the output frequency of the sensor correspondingly changes, the change of pressure is converted into the change of a signal, and the output of the sensor signal is realized. The upper spring 3 and the vortex buffer support 7 enable the magnetizer 4 to keep reciprocating consistency, when the movement of the magnetizer 4 changes a magnetic field, the linearity of a force value is consistent with the linearity precision of an inductor, and the linearity and the stability of the sensor are further improved. The pressure at the lower side of the rubber sealing body 5 is the same as the pressure to be detected through the air holes 9. The upper and lower positions of the rubber sealing body supporting plate 6 are adjusted by adjusting the bottom adjusting rod 8, so that the positions of the rubber sealing body 5 and the magnetizer 4 are adjusted, the initial position of the magnetizer 4 is accurately adjusted, the output initial signal is accurately adjusted, and the customization and output of high-precision signals are met.
Further, the ventilation holes 9 are rectangular holes, and an arc structure which is outwards recessed is arranged in the middle of each rectangular hole.
Further, the lower end of the air hole 9 is communicated with the outer side of the bottom cover 2, and the upper end of the air hole 9 is communicated with the inner cavity between the bottom cover 2 and the rubber sealing body 5.
Because the bottom adjusting rod 8 is arranged in the air hole 9, and the bottom adjusting rod 8 can not block the air hole 9 so as to ensure that the pressure at the lower side of the rubber sealing body 5 is the same as the pressure to be detected, the shape of the air hole 9 is limited, so that the bottom adjusting rod 8 can be screwed in the air hole 9, and the air hole 9 can be in an air-through state.
Further, the upper end of the bottom adjusting rod 8 is abutted against the lower end of the rubber seal body supporting plate 6, and the rubber seal body supporting plate 6 is abutted against the lower end of the rubber seal body 5.
The bottom adjusting rod 8 provides supporting force for the rubber sealing body supporting plate 6, so that the upper and lower positions of the rubber sealing body supporting plate 6 are adjusted, the rubber sealing body supporting plate 6 provides supporting force for the rubber sealing body 5, the upper and lower positions of the rubber sealing body 5 are adjusted, and the upper and lower positions of the magnetizer 4 are adjusted.
Further, the bottom adjusting rod 8, the rubber sealing body supporting plate 6, the magnetizer 4 and the upper spring 3 are coaxially arranged. And (5) optimizing an elastic curve and eliminating radial offset force.
Further, a spool 10 is arranged between the outer cover 1 and the rubber sealing body 5, the magnetizer 4 and the upper spring 3 are arranged in the spool 10, the enameled wire is wound on the outer side of the spool 10 to form a coil, the circuit board is arranged on the spool 10, the upper end of the upper spring 3 is provided with a screw 11, the screw 11 is fixedly arranged in the spool 10, two ends of the upper spring 3 are tightly pressed between the magnetizer 4 and the screw 11, the lower ends of the bottom cover 2 and the spool 10 are clamped, the rubber sealing body 5 is tightly pressed between the bottom cover 2 and the spool 10, a diaphragm plate 12 is arranged at the lower end of the magnetizer 4, a diaphragm plate 12 is borne at the upper side of the rubber sealing body 5, the magnetizer 4 is borne at the upper side of the diaphragm plate 12, a hollow inner cavity is arranged on the diaphragm plate 12, the inner cavity corresponds to the inner side of the magnetizer 4, and the rubber sealing body 5 is recessed towards the inner cavity of the diaphragm plate 12.
When the pressure sensor for outputting high-precision signals works, the lower ends of the air holes 9 are communicated with a device for detecting pressure, the bottom adjusting rod 8 is ensured not to block the air holes 9 through the shape of the air holes 9, so that the pressure on the lower side of the rubber sealing body 5 is the same as the pressure required to be detected, the bottom adjusting rod 8 is adjusted, the initial positions of the rubber sealing body supporting plate 6 and the rubber sealing body 5 are changed, and the rubber sealing body supporting plate is matched with the upper spring 3 to position the initial position of the magnetizer 4. When the pressure to be detected changes, the rubber sealing body supporting plate 6 and the rubber sealing body 5 move up and down under the action of the pressure, so that the diaphragm plate 12 drives the magnetizer 4 to move up and down in the coil, inductance is changed, and the frequency output of the oscillating circuit is used for feeding back the change of signals caused by the change of air pressure, so that the change of the output signals of the sensor is realized. The vortex-shaped buffer support 7 provides a force in the axial direction, and cooperates with the upper spring 3 to suspend the magnetizer 4 in the coil, and simultaneously eliminates the radial offset force of the upper spring 3 in the radial direction, so that the movement of the magnetizer 4 is in a free state in the radial direction, if only the upper spring 3 is used, the upper spring 3 is only fixed at the upper end, and when the upper spring 3 is loosened or pre-compressed, the initial pressure is nonlinear, so that the output frequency cannot be in a linear relation with the pressure value. By providing the bottom adjusting lever 8, the initial position of the magnetizer 4 in the free state is freely adjusted, thereby outputting an accurate initial signal value.
Claims (6)
1. A pressure sensor outputting a high-precision signal, characterized in that: comprises an outer cover (1), a bottom cover (2), an upper spring (3), a magnetizer (4), a rubber sealing body (5), a rubber sealing body supporting plate (6), a vortex-shaped buffer support (7), a bottom adjusting rod (8) and an air hole (9); the outer cover (1) is buckled above the bottom cover (2) to form an inner cavity, and the inner cavity is divided into an upper part and a lower part by the rubber sealing body (5); the magnetizer (4) and the upper spring (3) are arranged between the rubber sealing body (5) and the outer cover (1), the upper spring (3) is arranged on the upper side of the magnetizer (4), and coils are arranged on the outer sides of the magnetizer (4) and the upper spring (3); rubber seal body backup pad (6) and vortex form buffering support (7) set up between rubber seal body (5) and bottom (2), and vortex form buffering support (7) set up in the outside of rubber seal body backup pad (6), and the upper portion in bottom (2) is installed to the outer end of vortex form buffering support (7), and the lower part in rubber seal body backup pad (6) is installed at the center of vortex form buffering support (7), and bottom (2) lower part sets up bleeder vent (9), and bottom adjusting lever (8) set up in bleeder vent (9).
2. A pressure sensor outputting a high-precision signal as claimed in claim 1, wherein: the air holes (9) are rectangular holes, and an arc-shaped structure which is outwards sunken is arranged in the middle of each rectangular hole.
3. A pressure sensor outputting a high-precision signal according to claim 1 or 2, characterized in that: the lower end of the air hole (9) is communicated with the outer side of the bottom cover (2), and the upper end of the air hole (9) is communicated with the inner cavity between the bottom cover (2) and the rubber sealing body (5).
4. A pressure sensor outputting a high-precision signal as claimed in claim 1, wherein: the upper end of the bottom adjusting rod (8) is propped against the lower end of the rubber sealing body supporting plate (6), and the rubber sealing body supporting plate (6) is propped against the lower end of the rubber sealing body (5).
5. A pressure sensor outputting a high-precision signal as claimed in claim 1, wherein: the bottom adjusting rod (8), the rubber sealing body supporting plate (6), the magnetizer (4) and the upper spring (3) are coaxially arranged.
6. A pressure sensor outputting a high-precision signal as claimed in claim 1, wherein: the utility model discloses a rubber sealing device, including enclosing cover (1), rubber sealing body (5), set up spool (10) between enclosing cover (1) and the rubber sealing body (5), magnetizer (4) and last spring (3) set up in spool (10), enameled wire winding forms the coil in the outside of spool (10), the circuit board is installed on spool (10), the upper end of going up spring (3) sets up screw (11), screw (11) are installed and are fixed in spool (10), the both ends top of going up spring (3) tightly between magnetizer (4) and screw (11), the lower extreme joint of bottom (2) and spool (10) compresses tightly rubber sealing body (5) between bottom (2) and spool (10), the lower extreme of magnetizer (4) sets up diaphragm (12), the diaphragm (12) are born to rubber sealing body (5) upside, diaphragm (12) are born to diaphragm (12) upside, diaphragm (12) set up hollow inner chamber, the inner chamber corresponds with magnetizer (4) inside, rubber sealing body (5) are to diaphragm (12) inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321625519.XU CN219914742U (en) | 2023-06-26 | 2023-06-26 | Pressure sensor for outputting high-precision signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321625519.XU CN219914742U (en) | 2023-06-26 | 2023-06-26 | Pressure sensor for outputting high-precision signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219914742U true CN219914742U (en) | 2023-10-27 |
Family
ID=88427256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321625519.XU Active CN219914742U (en) | 2023-06-26 | 2023-06-26 | Pressure sensor for outputting high-precision signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219914742U (en) |
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2023
- 2023-06-26 CN CN202321625519.XU patent/CN219914742U/en active Active
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